Malicious PDF — malware analysis report

Static analysis result for SHA-256 23333fd5ff6f8f7a…

MALICIOUS

PDF

63.3 KB Created: 2020-12-03 04:02:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: abbf6bf8b67e8f5470ab8add20bcb820 SHA-1: 86d2140931bd5837206e617f7afbe3c2d8454681 SHA-256: 23333fd5ff6f8f7a559489f824217973aeed32c57085d4fd70e1db43ab16a01a
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/123?utm_term=combined+transformations+worksheet+answers'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL within the document body indicates an attempt to lure the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gettraff.ru/123?utm_term=combined+transformations+worksheet+answers In PDF document text
    • https://pudegubazamase.weebly.com/uploads/1/3/1/1/131163945/5284863.pdfIn PDF document text
    • https://jatokogeredere.weebly.com/uploads/1/3/3/9/133997843/gizituruki-bevifara-tebajixogidu.pdfIn PDF document text
    • https://zuseluxutiv.weebly.com/uploads/1/3/4/6/134686448/dotadefutozagevidar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/27807a30-3eba-476c-b2b1-b3598f76b8f7/nosukakegudikajivagi.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/3906825872.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/ielts_upgrade_8_reading_test_5_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/15486035404.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b2e4ee7-11e4-44cb-873a-b500e648e62b/jezulilotenamed.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe02caf3de5e49b52abfeb/1606288076041/one_page_strategy.pdfIn PDF document text
    • https://s3.amazonaws.com/jebupofedijakuk/pharmacologie_de_l_appareil_respiratoire.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/65259188816.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dfd5d5c-f6d1-4c20-ad56-a28c5e4ffdb0/chloe_salpa_ts.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd06b42edfcd2bda92a980/1606223541228/trolley_stop_new_orleans_yelp.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB025 5316 bytes
SHA-256: 3796023efb3bd78e986b0c623ea08b4ec367e5793063156c4746146a8e29c788
font_01_sfnt_off0000c210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC210 3128 bytes
SHA-256: 7a84c6cf4f46d4bac8fb6ba896b1cdf686c60a6b9912cc82b79a416172af7d16
font_02_sfnt_off0000ced1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCED1 10000 bytes
SHA-256: 0d4ed50b76f4d21831b26cbf92fc3d5c1f43b79f03cec0733ca5cb4aff9bf69d

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